n The aggregate of past events.
n The branch of knowledge that studies the past; the assessment of notable events.
n The portion of the past that is known and recorded by this field of study, as opposed to all earlier and unknown times that preceded it (prehistory).
n (countable) A set of events involving an entity.
n (countable) A record or narrative description of past events.
n (countable, medicine) A list of past and continuing medical conditions of an individual or family.
n (countable, computing) A record of previous user events, especially of visited web pages in a browser.
n (informal) Something that no longer exists or is no longer relevant.
n (uncountable) Shared experience or interaction.
v (obsolete) To narrate or record.